1.High temperature stability magnets
2.Grade L38SHT,L42SHT,L35UHT,L38EHT...
3.Customized permanent magnets
4. Used in permanent magnet motors
Product name:High temperature stability block magnets
High temperature stability block magnets grade L42SHT
The Magnetic Properties of L42SHTHigh Temperature Resistance Neodymium Magnets
Residual Induction - Br = 12.8 - 13.2 kGs / 1,280 - 1,320 mT
Coercive Force - Hcb ≥ 12.4 kOe / ≥ 987 kA/m
Intrinsic Coercive - Hcj ≥ 20 kOe / ≥ 1,592 kA/m
Maximum Energy Product - (BH)max = 40 - 43 MGOe / 318 - 342 kJ/m3
Maximum Working Temperature - Tw = 150°
Some other magnetic properties or our L-T grades magnets,Grade L38SHT,L42SHT,L35UHT,L38EHT... please refer to our Magnetic properties of Sintered NdFeB magnets:
| Magnetic properties of Sintered NdFeB magnets: | |||||
| Grade | Remanence | Coercive Force | Intrinsic Coercive Force | Max. energy product | Max. |
| Operating | |||||
| Temperature | |||||
| Br | Hcb | Hcj | (BH ) | Tw | |
| max | |||||
| mT | kA/m | kA/m | kJ/m3 | ||
| (kGs) | (kOe) | (kOe) | (MGOe) | ||
| N35 | 1170-1220 | ≥868 | ≥955 | 263-287 | 80 °C |
| (11.7-12.2) | (≥ 10.9) | (≥ 12) | (33-36) | ||
| N38 | 1220-1250 | ≥899 | ≥955 | 287-310 | 80 °C |
| (12.2-12.5) | (≥ 11.3) | (≥ 12) | (36-39) | ||
| N40 | 1250-1280 | ≥907 | ≥955 | 302-326 | 80 °C |
| (12.5-12.8) | (≥ 11.4) | (≥ 12) | (38-41) | ||
| N42 | 1280-1320 | ≥915 | ≥955 | 318-342 | 80 °C |
| (12.8-13.2) | (≥ 11.5) | (≥ 12) | (40-43) | ||
| N45 | 1320-1380 | ≥923 | ≥955 | 342-366 | 80 °C |
| (13.2-13.8) | (≥ 11.6) | (≥ 12) | (43-46) | ||
| N48 | 1380-1420 | ≥923 | ≥876 | 366-390 | 80 °C |
| (13.8-14.2) | (≥ 11.6) | (≥ 12) | (46-49) | ||
| N50 | 1400-1450 | ≥796 | ≥876 | 382-406 | 80 °C |
| (14.0-14.5) | (≥ 10.0) | (≥ 11) | (48-51) | ||
| N52 | 1430-1480 | ≥796 | ≥876 | 398-422 | 60°C |
| (14.3-14.8) | (≥ 10.0) | (≥ 11) | (50-53) | ||
| 35M | 1170-1220 | ≥868 | ≥1114 | 263-287 | 100 °C |
| (11.7-12.2) | (≥ 10.9) | (≥ 14) | (33-36) | ||
| 38M | 1220-1250 | ≥899 | ≥1114 | 287-310 | 100 °C |
| (12.2-12.5) | (≥ 11.3) | (≥ 14) | (36-39) | ||
| 40M | 1250-1280 | ≥923 | ≥1114 | 302-326 | 100 °C |
| (12.5-12.8) | (≥ 11.6) | (≥ 14) | (38-41) | ||
| 42M | 1280-1320 | ≥955 | ≥1114 | 318-342 | 100 °C |
| (12.8-13.2) | (≥ 12.0) | (≥ 14) | (40-43) | ||
| 45M | 1320-1380 | ≥995 | ≥1114 | 342-366 | 100 °C |
| (13.2-13.8) | (≥ 12.5) | (≥ 14) | (43-46) | ||
| 48M | 1370-1430 | ≥1027 | ≥1114 | 366-390 | 100 °C |
| (13.7-14.3) | (≥ 12.9) | (≥ 14) | (46-49) | ||
| 50M | 1400-1450 | ≥ 1033 | ≥1114 | 382-406 | 100 °C |
| (14.0-14.5) | (≥ 13.0) | (≥ 14) | (48-51) | ||
| 35H | 1170-1220 | ≥868 | ≥1353 | 263-287 | 120 °C |
| (11.7-12.2) | (≥ 10.9) | (≥ 17) | (33-36) | ||
| 38H | 1220-1250 | ≥899 | ≥1353 | 287-310 | 120 °C |
| (12.2-12.5) | (≥ 11.3) | (≥ 17) | (36-39) | ||
| 40H | 1250-1280 | ≥923 | ≥1353 | 302-326 | 120 °C |
| (12.5-12.8) | (≥ 11.6) | (≥ 17) | (38-41) | ||
| 42H | 1280-1320 | ≥955 | ≥1353 | 318-342 | 120 °C |
| (12.8-13.2) | (≥ 12.0) | (≥ 17) | (40-43) | ||
| 45H | 1320-1360 | ≥963 | ≥1353 | 342-366 | 120 °C |
| (13.2-13.6) | (≥ 12.1) | (≥ 17) | (43-46) | ||
| 48H | 1370-1430 | ≥955 | ≥1353 | 366-390 | 120 °C |
| (13.7-14.3) | (≥ 12.5) | (≥ 17) | (46-49) | ||
| 35SH | 1170-1220 | ≥876 | ≥1592 | 263-287 | 150 °C |
| (11.7-12.2) | (≥ 11.0) | (≥ 20) | (33-36) | ||
| 38SH | 1220-1250 | ≥907 | ≥1592 | 287-310 | 150 °C |
| (12.2-12.5) | (≥ 11.4) | (≥ 20) | (36-39) | ||
| 40SH | 1240-1280 | ≥939 | ≥1592 | 302-326 | 150 °C |
| (12.5-12.8) | (≥ 11.8) | (≥ 20) | (38-41) | ||
| 42SH | 1280-1320 | ≥987 | ≥1592 | 318-342 | 150 °C |
| (12.8-13.2) | (≥ 12.4) | (≥ 20) | (40-43) | ||
| 45SH | 1320-1380 | ≥ 1003 | ≥1592 | 342-366 | 150 °C |
| (13.2-13.8) | (≥ 12.6) | (≥ 20) | (43-46) | ||
| 28UH | 1040-1080 | ≥764 | ≥1990 | 207-231 | 180 °C |
| (10.4-10.8) | (≥ 9.6) | (≥ 25) | (26-29) | ||
| 30UH | 1080-1130 | ≥812 | ≥1990 | 223-247 | 180 °C |
| (10.8-11.3) | (≥ 10.2) | (≥ 25) | (28-31) | ||
| 33UH | 1130-1170 | ≥852 | ≥1990 | 247-271 | 180 °C |
| (11.3-11.7) | (≥ 10.7) | (≥ 25) | (31-34) | ||
| 35UH | 1180-1220 | ≥860 | ≥1990 | 263-287 | 180 °C |
| (11.8-12.2) | (≥ 10.8) | (≥ 25) | (33-36) | ||
| 38UH | 1220-1250 | ≥876 | ≥1990 | 287-310 | 180 °C |
| (12.2-12.5) | (≥ 11.0) | (≥ 25) | (36-39) | ||
| 40UH | 1250-1280 | ≥ 899 | ≥1990 | 302-326 | 180 °C |
| (12.5-12.8) | (≥ 11.3) | (≥ 25) | (38-41) | ||
| 42UH | 1280-1320 | ≥ 899 | ≥1990 | 318-342 | 180 °C |
| (12.8-13.2) | (≥ 11.3) | (≥ 25) | (40-43) | ||
| 28EH | 1040-1080 | ≥780 | ≥2388 | 207-231 | 200 °C |
| (10.4-10.8) | (≥ 9.8) | (≥ 30) | (26-29) | ||
| 30EH | 1080-1130 | ≥812 | ≥2388 | 223-247 | 200 °C |
| (10.8-11.3) | (≥ 10.2) | (≥ 30) | (28-31) | ||
| 33EH | 1130-1170 | ≥876 | ≥2388 | 247-271 | 200 °C |
| (11.3-11.7) | (≥ 10.5) | (≥ 30) | (31-34) | ||
| 35EH | 1170-1220 | ≥876 | ≥2388 | 263-287 | 200 °C |
| (11.7-12.2) | (≥ 11.0) | (≥ 30) | (33-36) | ||
| 38EH | 1220-1250 | ≥899 | ≥2388 | 287-310 | 200 °C |
| (12.2-12.5) | (≥ 11.3) | (≥ 30) | (36-39) | ||
| 40EH | 1250-1280 | ≥899 | ≥2388 | 302-326 | 200 °C |
| (12.5-12.8) | (≥ 11.3) | (≥ 30) | (38-41) | ||
| 28AH | 1040-1080 | ≥787 | ≥2624 | 207-231 | 230 °C |
| (10.4-10.8) | (≥ 9.9) | (≥ 33) | (26-29) | ||
| 30AH | (1080-1130) | ≥819 | ≥2624 | 223-247 | 230 °C |
| (10.8-11.3) | (≥ 10.3) | (≥ 33) | (28-31) | ||
| 33AH | 1130-1170 | ≥843 | ≥2624 | 247-271 | 230 °C |
| (11.3-11.7) | (≥ 10.6) | (≥ 33) | (31-34) | ||
| 35AH | (1170-1220) | ≥ 876 | ≥2624 | 263-287 | 230 °C |
| (11.7-12.2) | (≥ 11.0) | (≥ 33) | (33-36) | ||
| 38AH | 1220-1250 | ≥ 899 | ≥2624 | 287-310 | 230 °C |
| (12.2-12.5) | (≥ 11.3) | (≥ 33) | (36-39) | ||
1.The NdFeB magnet properties change as the temperature changes. Ordinarily, when the temperature is up, the magnet properties are down. We use αBr, βHcj measuring the temperature stability of NdFeB magnet.
αBr: Reversible Temperature Coefficient of Br,
Br(20): Br at 20 ℃, Br(T): Br at T ℃
βHcj: Reversible Temperature Coefficient of Hcj
Hcj(20): Hcj at 20 ℃, Hcj(T): Hcj at T ℃
Usually, the industrial standards ofβHcj: is over -0.7%/℃, while theβHcj: of our developed magnet is less than -0.4%/℃, it helps our magnets with excellent temperature stability.
2. Application which needs the high temperature stability
High temperature stability magnets are mainly used in car motors, EPS, brake motors, servo motors and other permanent magnet motors.
3. Correlative temperature coefficient data
Grade Serial NO. | Conventional Formula | T-Series | L-TSeries |
αBr | -0.11~-0.128%/℃ | -0.1-0.11%/℃ | -0.09~-0.1%/℃ |
βHcj | -0.6~-0.7%/℃ | -0.55~-0.6%/℃ | -0.4~-0.55%/℃ |
Notes: TheαBr, βHcj is relative to aspect ratio, square degree chart(BH curve) etc. Higher the aspect ratio is, higher the working temperature can be. Our recommended aspect ratio is over 0.5.
The data of a certain grades, please feel free to contact us. Ordinarily, if you have the requests on αBr, βHcj, please inform the details while placing the order. Sample test is needed before mass production.
For more details, please consult our engineer.
The Physical properties of sintered NdFeB material
| Physical properties of sintered NdFeB material | ||
| Properties | Unit | Standard |
| Curiepoint | ℃ | 310~380 |
| Reversible temperature coefficientof Br | %/℃ | -0.09~-0.13 |
| Reversible temperature coefficientof Hcj | %/℃ | 0.4~0.7 |
| Maximumworking temperature | ℃ | 80230 |
| Density | g /cm3 | ≥7.47.8 |
| Vickershardness | HV | 550650 |
| Bendingstrength | MPa | 250 |
| Tensilestrength | MPa | 80 |
| Compressivestrength | MPa | 1050 |
| Specificresistance | µΩ·cm | 150 |
| Thermalconductivity | W/(m℃) | 68 |
| Thermal expansion | 10-6 /℃ | 5(parallel to the orientation) |
| 1.5(Perpendicularto the orientation) | ||
Our advantages: 1. Original factory with professional technical and servers.
2. Strict quality control systems under certification TS16949 and ISO 9001
3. Latest facilities to support R&D, quality control, process control, final product inspection
4. Very low prices due to our production well controlled , process optimization,
5, Fast lead time
6. Motto: partnership with all customers
